Homopolymer tail length

In most instances, ROMP is utilized to arrange monomer blocks sequentially into distinct amphiphilic domains in order to create a polymer capable of self-assembly. In this way, one can vary the hydrophobic tail length and hydrophilic head size in order to create a wide range of morphologies. Shunmugam and coworkers [84] have shown that homopolymers comprised of only one type of... 

In this section we give a selection of theoretical and experimental results for homopolymer adsorption. For a meaningful comparison between theory and experiment it is mandatory that the experimental system Is well defined, with as many parameters known as possible (chain length and chain-length distribution, solvency, adsorbent properties, etc.). Wherever feasible, we shall discuss theoretical predictions In combination with experimental data. However, this correspondence cannot be malnteiined in all cases there are useful theoretical predictions that, as yet, cannot be checked experimentally (for example, the relative contributions of loops and tails), whereas for some measurable quantities no quantitative theory has yet been developed (for example, most kinetic data). 

The primary structure of macromolecules is defined as the sequential order of monomers connected via covalent chemical bonds. This structural level includes features such as chain length, order of monomer attachment in homopolymers (head-to-head, head-to-tail placement), order of monomer attachment in various copolymers (block copolymers, statistical and graft copolymers, chemical composition of co-monomers), stereoregularity, isomers, and molecular topology in different branched macromolecules and molecular networks. Structure at this primary level can be manipulated by polymer synthesis [4]. With AFM it is possible to visualize, under certain conditions, single macromolecules (Fig. 3.2) and it is even possible to manipulate these (i.e. push with AFM tips). Characteristics of chain-internal... 

For a binary blend of thread homopolymers the structure of each chain is specified by its statistical segment length, ctm, segmental hard core diameter, Am = d, degree of polymerization, Nm, and the attractive tail potentials, VMM (r) The structural asymmetry on an equal volume basis is given by the ratio... 

A m or difference between adsorption of homopolymers and block copolymers is that in the case of block copolymers, the fractions of trains and loops are smaller than that of the tails. Consequently, the volume profile in block copolymers exhibits a parabolic decay with distance (52,53). In the case of random copolymers, in addition to the solvent quality and the copolymer chain length, adsorption is also strongly affected by the composition and distribution of the monomers along the chain. For a truly statistical copolymer, the adsorption behavior can be expected to be between the behaviors of the two homopolymers (31). 

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